Cyano/nuisance algae with 0 Phosphate/Nitrate

Dinos gone, cyano still sticking around. NO3 finally detectable without dosing KNO3, but sps still very pale. Took the chaeto offline completely, fish load is still light as I've had some QT setbacks with an ich strain that is longer than 30 days and no room for more QT tanks.

Frag tank in contrast is doing wonderfully and full of SPS that are encrusting very quickly, not a spec of nuisance algae in that tank and it's hovering around 4ppm no3 .03ppm po4
 
I use RO/DI water with incoming TDS of 2 (after I flush the unit) and outgoing TDS of 0. My issue doesn't appear to be nitrates/phosphates too high, but nitrates/phosphates too low.



I went ahead and added Chemiclean today. Hopefully, the chaeto will take-up the additional nutrients.

Regarding increasing nitrates and phosphates, is there a product one can manually dose to raise nitrates and phosphates?
Yes, you can directly add no3 and p04 to your aquarium. Ive been using potasium nitrate and am going to pickup some potassium phosphate within the next couple of days. In an attempt to help curve my out break of cyano bacteria.
 
973EE36C-FF7F-4D89-94B3-A50DCACEA793.jpeg 878F135A-AE73-40F4-A5F9-F36CC4B704B3.jpeg Hey guys I’m going through the same so from what I’ve read in this thread is this stuff is growing because there’s no nutriance zero nitrates and phos ???
 
Is it possible this could be a sprulina type algae instead?
Continuim bacteria m may help w ou th the cyano.
I am having a similar issue just kinda reversed. Zero phosphates, high nitrates. I was talking with a local reefer we were talking about taking my gfo offline, raising phos a bump to hopefully allow the nitrates to come down via water changes.
Also was.curious and thinking of using seachem.matrix in the sump as a nitrate remover. Any thoughts on this?
My outbreak is very light but has consistantly been hanging around for around a month. I remove as much as possibly every week, increased sock changes to every other day, reduced feeding, started skimming wet, introduced my old cheato reactor back onto the system, removed foam guards on mp40s as they would get dirty quickly, altered flow to stir up the tank a lil more, slightly reduced lighting.
 
I'm having the same issue. So far I started to remove the sand...tired of dealing with all the bottles and it only effects the sand strangely
 
I'm having the same issue. So far I started to remove the sand...tired of dealing with all the bottles and it only effects the sand strangely

Mines on the substrate and on several of my rocks.
I pulled out 80% of my substrate and it may have been too much. Now i think it caused the system to crash.
 
I was able to reduce mine quickly simply by reducing feeding, water change and more regular swap and n the socks. Blew off all the rocks, cleaned power heads and removed as much as possible from display via airline tubing..just syohoned it out.
It's been gone for about a month now.
 

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